Spraying device



W. HERMANN oct. a, 1931.

Y SPRAYIG- DEVICE Filed Dec. 14, .1928

Patented @ab 6,v 1931 UNITED STATES PATENT carical WOLFGANG- HERMANN, CHICAGO, ILLINOIS, ASSIGNOR TO METAL SPECIALTIES MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS srnnvnie Davies Application led December 14, 1928. vSerial No. 326,135.

. This invention relates particularly to spraying devices adapted for spraying liquids, for example, varnishes, etc.

The primary object of the invention is to provide an vimproved nozzle-container struc ture.

- The invention is illustrated in the accompan g drawinfs in which- Figll shows beia'olienly and partly in section a spraying outfit embodying the invention;

Fig. 2 is a sectional view illustrating the use of a smaller container than that shown in 4Fig. l; and Fig.'3 is a section taken as indicated at line 3 of Fig. 1.

In the construction illustrated, A designates an electric motor which surmounts a handle A and is equipped with a rotary compresser A2, lthe rotor of which is actuated by the armature-shaft of the motor; B desig- '20 nates a sectionally'constructed spraying-nozzle whichin the illustration given is carried by the compressor;'C designates a container-V cap equipped with a ring C which is connected with the nozzle; and C? and C3`designate containers of different sizes adapted to be interchangeably usedin connection with the cap C. 1

The compressor is shown provided vwith a forwardly rojecting hollow boss l which is internally t readed and whichcommunicates with the outlet'passage 1a of the compressor. The details of the compressor need jnotbe explained in the present application, but it l may bestated that the compressor is provided Ftion the passage 4", and with forwardly' converging passages 4 leading from the annular passage 4"; and the member 5 is provided with a central liquid-passage 5* o with converging air-passages 5" which comniunicate at their rear ends with the airpassages 4d.

The member 3 is provided at its rear end with a threaded shank 3h which is connected with the nipple 1. The member 4 is provided at its rear end with a threaded shank 4e which has threaded connection with a bore 3 with which the member 3 is provided at its front end.

The member 4 is provided With an annular surface, or seat, 4f for the ring C', and'with a shoulder 4g against which the front edge of the ring abuts The ring Vforms the outer wall ofthe annular passage 4; and the member 3 has its front end provided with a shoulder 3d which abuts against the rear edge f of the ring.

The front end of the member 4 and the rear end of the member 5 are provided with complemental annular recesses which provide an annular passage 6 at the meeting ends of the members.

The member 5 is provided at its `rear end y with a reduced threaded extension 5 which screws into a central liquid passage 4l1 with which the member 4 is provided. A vertical passagev 4i in the member 4 communicates with the central passage 4h. The lower end of the passage 4i is tapped and has screw connection with a liquid-tube 7 which depends into the container.

The nozzle-section 5 is equipped with a tip which comprises an inner tip-member 8 and an outer tipmember 9. The inner member is secured to the member 5 by means of an annular nut 10. This member has an inturned iange 10a which engages lan external flange at the base of the member 8, and it has an out turned ange 10b which is engaged by an annular nut 11 having screw. connection with' a ange 9*l of the cap-like ti -member 9. The

member Shas acentral liqui -pa'ssage SWhich registers with the passage 5", and has con v verging air-passages 8b which communicate,

with the passages 5b. At the'meeting ends of these members 5 and 8 arecomplemental annular recesses forming an annular channel 12. Y

The outer tip-member 9 is provided with an outlet 9b for the liquid and air.A This pas` tions of the nozzle.

sage 9b may terminate in an orifice 9, which may be either a slot7 or a circular orice.

The container-cap C and the ring C' are preferably formed integrally with each other andconnected by a stem, or neck, 13. The device may be formed of cast aluminum, for example. At its inner side, the cap is provided with a threaded socket 14 of suitable size to receive the threaded upper end of the small container C3, and is provided with a larger threaded socket 15 adapted to receive the threaded upper end of the large container C2. These sockets are equipped with gaskets 14 and 15a, respectively.

Through the stem 13 connecting the ring.

C with the cap C extends a passage 16 which connects the annular passage ic with the interior of the container C2. rIhe liquid-tube 7`is of smaller diameter than the passage 16. The tube may be inserted through said passage and screwed into the tapped passage 4J.

In the operation of the device compressed air passes through the passages 3a, la and 4J to the annular passage llc; thence through the convergent air-passages to the tip of the nozzle. A portion of the air may enter the upper portion of the container C2. When the device is operating, liquid rises through the tube? to the passage ih and thence through the central passages 5a and 8a tothe tip of the nozzle. At the tip of the inner member 8, the liquid is atomized by the air and then is expelled through the passage 9b.

. In operating the device for applying varnish, for example, the large container C2 may be used for most of the work. After finishing the painting operation, the container C2 may be removed and the container C3, filled with a solvent, may be connected with the socket 14. The device may then be operated to force the solvent through the nozzletip, thus cleansing thvparts of the tip porien necessary or desirable, the nozzle may be taken apart for more thorough cleaning or for replacement of parts.

In many cases, it is desirable-to use a number of containers carrying small quantities of varnishes of different colors. For this purpose, a plurality of small containers like the container C3 may be used to enable different colors to be applied, as desired.

At the end of the operation, air vpressure within the container will be relieved by air passing to the annular passage le and thence back'to the compressor and out through the intake opening 2 to the atmosphere.

1 The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible, in view of the prior art.

What I regard as new, and desire to secure by Letters Patent, is:

1. In combination: a container cover equipped with a ring; and a nozzle comprising a pair of sections, one of said sections having a bearing extending through said ring, said sections having screw connections and having shoulders clamping the ring between them, said bearing having an annular air-passage communicating with the interior of said cap.

In a device of the character set forth, a ring having a depending stem and cap carried thereby, and a nozzle comprising a section having a central liquid-passage and equipped Wit-h a tube depending through a passage in said stem and said section having an external bearing surface and an annular channel formed therein and forwardly convergent air-passages leading from said annular channel, said section having also at its rear end a central air-passage communicating with said annular passage, and a companion section having screw connection with said first-mentioned section, said ring being clamped between said sections and forming the outer wall of said annular passage.

3. In means of the character Iset forthya p container-cap equipped with a ring and having an air-passage leading from the interior of the cap to the interior of the ring and a liquid-tube extending freely through said passage, in combination with a nozzle comprising: a rear section having a central airpassage and provided at its front end with an interiorly threaded socket, an intermediate section having a bearing extending through said ring and an annular channel whose outer wall is formed by said ring, said intermediate section having at its rear end a threaded shank connected with said socket and a passage connecting said annular passage with the passage of said rear section, said intermediate section having forwardly convergent air-passages leading from said annular passage and having a central liquidpassage connected with said tube; a front section having convergent air-passages communicating with said first-mentioned convergent passages and having a central liquidpassage communicating with said first-mentioned liquid-passage; and a nozzle-tip comprising an inner tip-member having a central liquid-passage and having convergent air-passages, and an outer cap-like tipmember, a nut clamping said inner tip-member to said front nozzle section, and a nut securing said cap-like tip-member to said lirst-mentioned nut.

4. In a device of the character set forth, a-nozzle comprising a pair of sections provided With air-passages, one of said sections being provided with a liquid-passage, said sections having screw connections and one of said sections being provided with a bearing, and a container-cap having a ring iisy through which said bearing extends and which is clamped between said sections.

5. In a device of the character set forth, a nozzle comprising a pair of sections provided with air-passages, one of said sections being provided with a liquid-passage, said sections having screw connections and one of said sections being provided with a bearing, a container-cap having a plurality of sockets of different Vdiameters and equipped with a rino through which said bearing extends and whichl is clamped between said sections, said cap having an air-passage leading therethrough to the interior of said ring, and a 15 liquid-tube extending freely through the airpassage in said cap. l

6. In a spraying device, a nozzle comprising three main sections consisting of a front section, a rear section, and an intermediate section, said intermediate section having an annular air-passage and forwardly convergent air-passages leading therefrom and hav- -ing a central rear air-passage communicating with said annular passage and said intermediate section having also va central liquidpassage, said rear section 'having a central air-passage communicating with the central air-passage of said intermediate section, and said front section having a central liquidpassage communicating with the liquid-passage of said intermediate section and having forwardly convergent air-passages communieating with said irst-mentioned convergent air-passages; a nozzle-tip comprising inner y and outer tip-members secured to said section; a container-cap having a ring clamped between said intermediate section and rear section; and a liquid-tube extending through said container-cap and communicating with the liquid-passage of said intermediate section.

WOLFGANG HERMANN. 

